number cannot be prime? I have checked this for n from 3 to 53,509, the latter being the limit for unsigned int. I believe this is true, and I thereby claim that this is a true statement. However, I don't see any obvious explanation for it.(adsbygoogle = window.adsbygoogle || []).push({});

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# How come, for any n > 2, the nth triangular number + the nth square

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